mirror of https://github.com/axmolengine/axmol.git
137 lines
4.0 KiB
C++
137 lines
4.0 KiB
C++
/****************************************************************************
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Copyright (c) 2013 cocos2d-x.org
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "CCShaderNode.h"
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NS_CC_EXT_BEGIN
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enum
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{
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SIZE_X = 128,
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SIZE_Y = 128,
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};
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CCShaderNode::CCShaderNode()
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: m_center(vertex2(0.0f, 0.0f))
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, m_resolution(vertex2(0.0f, 0.0f))
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, m_time(0.0f)
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, m_uniformCenter(0)
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, m_uniformResolution(0)
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, m_uniformTime(0)
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{
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}
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CCShaderNode *CCShaderNode::shaderNodeWithVertex(const char *vert, const char *frag)
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{
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CCShaderNode *node = new CCShaderNode();
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node->initWithVertex(vert, frag);
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node->autorelease();
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return node;
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}
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bool CCShaderNode::initWithVertex(const char *vert, const char *frag)
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{
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loadShaderVertex(vert, frag);
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m_time = 0;
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m_resolution = vertex2(SIZE_X, SIZE_Y);
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scheduleUpdate();
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setContentSize(CCSizeMake(SIZE_X, SIZE_Y));
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setAnchorPoint(ccp(0.5f, 0.5f));
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return true;
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}
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void CCShaderNode::loadShaderVertex(const char *vert, const char *frag)
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{
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CCGLProgram *shader = new CCGLProgram();
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shader->initWithVertexShaderFilename(vert, frag);
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shader->addAttribute("aVertex", kCCVertexAttrib_Position);
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shader->link();
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shader->updateUniforms();
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m_uniformCenter = glGetUniformLocation(shader->getProgram(), "center");
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m_uniformResolution = glGetUniformLocation(shader->getProgram(), "resolution");
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m_uniformTime = glGetUniformLocation(shader->getProgram(), "time");
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this->setShaderProgram(shader);
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shader->release();
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}
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void CCShaderNode::update(float dt)
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{
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m_time += dt;
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}
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void CCShaderNode::translateFormOtherNode(CCAffineTransform &transform)
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{
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CCNode::setAdditionalTransform(transform);
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m_center = vertex2(m_sAdditionalTransform.tx * CC_CONTENT_SCALE_FACTOR(), m_sAdditionalTransform.ty * CC_CONTENT_SCALE_FACTOR());
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m_resolution = vertex2( SIZE_X * m_sAdditionalTransform.a, SIZE_Y * m_sAdditionalTransform.d);
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}
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void CCShaderNode::setPosition(const CCPoint &newPosition)
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{
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CCNode::setPosition(newPosition);
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CCPoint position = getPosition();
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m_center = vertex2(position.x * CC_CONTENT_SCALE_FACTOR(), position.y * CC_CONTENT_SCALE_FACTOR());
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}
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void CCShaderNode::draw()
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{
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CC_NODE_DRAW_SETUP();
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float w = SIZE_X, h = SIZE_Y;
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GLfloat vertices[12] = {0, 0, w, 0, w, h, 0, 0, 0, h, w, h};
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//
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// Uniforms
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//
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getShaderProgram()->setUniformLocationWith2f(m_uniformCenter, m_center.x, m_center.y);
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getShaderProgram()->setUniformLocationWith2f(m_uniformResolution, m_resolution.x, m_resolution.y);
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// time changes all the time, so it is Ok to call OpenGL directly, and not the "cached" version
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glUniform1f(m_uniformTime, m_time);
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ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position );
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glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, vertices);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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CC_INCREMENT_GL_DRAWS(1);
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}
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NS_CC_EXT_END
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